Allen-Bradley ABB ACS800 Standard Firmware

A failure has occurred in a current transformer within the output current measurement circuit. This will lead to inaccurate or no current feedback for the drive, severely impacting motor control, protection functions, and overall drive performance.

The drive has detected excessive output current unbalance, typically due to an earth fault in the motor or motor cable. For systems with parallel inverter modules (xx refers to module number 1-12), this may indicate an unbalance across units or an internal fault. This condition poses a risk of electrical shock and equipment damage.

An excessive DC voltage has been detected in the intermediate circuit of the drive. The DC overvoltage trip limit is calculated as 1.3 × 1.35 × U1max, which corresponds to 728 VDC for 400 V units, 877 VDC for 500 V units, and 1210 VDC for 690 V units. This fault is associated with bit 2 of Fault Word 1 (3.05 FW 1).

The drive is limiting torque due to an intermediate circuit DC voltage that is either too high or too low. This is an informative alarm (programmable Fault Function 30.23, bit 1: DC_VOLT_LIM_IND) indicating the drive is actively compensating to protect internal components from over or undervoltage conditions.

The intermediate circuit DC voltage is insufficient, which can be caused by a missing supply voltage phase, a blown input fuse, or an internal fault within the rectifier bridge. The DC undervoltage trip limit is 0.6 × 1.35 × U1min, corresponding to 307 VDC for 400 V and 500 V units, and 425 VDC for 690 V units. This fault is associated with bit 2 of Fault Word 2 (3.06 FW 2).

The control board temperature has exceeded 88°C. This indicates inadequate cooling or excessively high ambient temperatures in the drive enclosure, which can lead to control board malfunction, erratic behavior, or permanent damage.

The motor temperature is excessively high, or appears high, due to factors such as excessive load, insufficient motor power for the application, inadequate motor cooling, or incorrect drive start-up data. Sustained overtemperature operation risks motor winding damage and premature failure.

The measured temperature of motor 1 has exceeded the alarm limit set by parameter 35.02. This indicates a potential overheating condition specific to motor 1, requiring attention to prevent damage.

The measured temperature of motor 2 has exceeded the alarm limit set by parameter 35.05. This indicates a potential overheating condition specific to motor 2, requiring attention to prevent damage.

The control panel, which was selected as the active control location for the drive, has ceased communicating. This prevents local control, monitoring, and parameter adjustment via the panel, potentially disrupting operator interface.

A communication error has occurred on the control board, specifically on channel CH1. This issue is often caused by electromagnetic interference. The fault is indicated by bit 6 of Fault Word 2 (3.06 FW 2).

There is an incorrect connection of the brake resistor. Improper wiring can prevent the brake resistor from functioning correctly during braking operations or lead to premature damage.

The brake resistor is overloaded, leading to excessive temperature. This can occur if the braking cycle is too demanding, if the supply AC voltage to the drive is excessive, or if the resistor overload protection is misconfigured, risking damage to the resistor.

The motor is operating in a stall region, which occurs when the load exceeds the motor's capability, or the motor power is insufficient for the application. This fault is linked to bit 14 of Fault Word 2 (3.06 FW 2) and controlled by Fault Functions 30.10 through 30.12.

A communication fault exists between the pulse encoder and its interface module, or between the interface module and the drive itself. This prevents accurate speed and position feedback, potentially causing control instability or incorrect motor operation.

The pulse encoder phasing is incorrect, specifically Phase A is connected to the terminal for Phase B and vice versa. This will result in incorrect speed or position feedback, potentially causing motor rotation direction issues or control instability.

A pulse encoder phase signal is missing, indicating a potential issue with the encoder, its wiring, or the encoder interface module. This will lead to inaccurate speed or position feedback for the drive, potentially affecting motor control stability.

Cyclical communication between the drive and the master control system is lost. This indicates a disruption in the fieldbus communication link, potentially due to incorrect parameter settings, physical cable issues, or a problem with the master device itself. Loss of communication can halt drive operation if the master control is critical.

An analog input signal (e.g., 0-10V, 4-20mA) has fallen below its configured minimum limit, which must be set to 0.5V (1 mA) or above in parameter group 13. Depending on parameter 30.01 (AI<MIN FUNCTION), the drive may trip, set a constant speed (12.16), or freeze at the last operating speed.

A fault has been triggered by an external device connected to the drive. This fault is typically configured to activate via one of the drive's programmable digital inputs. It is associated with bit 8 of Fault Word 2 (3.06 FW 2) and programmable via Fault Function 30.03.

The inverter type (e.g., sr0025_3) has been changed, a process typically performed at the factory or during initial drive implementation. This alarm signals that the new hardware configuration needs validation by cycling the control board power.

The inverter type (e.g., sr0025_3) has been changed, a process typically performed at the factory or during drive implementation. This alarm indicates that a power cycle of the control board is specifically required to validate and apply the new inverter type configuration.

A fault has been detected on the line side converter. Specific details regarding this fault are typically documented in the dedicated line side converter manual.

Motor data required by the drive is either missing or the configured motor data does not match the inverter's requirements. This fault is linked to bit 1 of Fault Word 2 (3.06 FW 2).

One of the motor phases has been lost, indicating a fault within the motor, the motor cable, an external thermal relay (if used), or an internal drive fault. This fault is associated with bit 15 of Fault Word 2 (3.06 FW 2) and can be configured via Fault Function 30.16.

The drive supply voltage is excessive, exceeding 124% of the unit's nominal voltage rating (e.g., >415V, >500V, or >690V). This overvoltage condition causes the motor speed to rapidly increase, rushing to a trip level of 40% of nominal speed, indicating a potentially dangerous power supply condition.

The drive output filter (choke) has an excessive temperature. This supervision function is typically used in step-up drives and indicates potential overheating due to restricted airflow, a faulty filter fan, or high ambient temperatures, risking damage to the filter components.

The drive output filter fan has an excessive temperature. This supervision is active in step-up drives and indicates potential overheating if airflow is restricted, the fan is faulty, or ambient temperatures are too high, risking damage to the filter or drive.

The drive is actively limiting motor torque based on the calculated motor pull-out torque limit and the minimum/maximum torque limits defined by parameters 20.13 (MIN TORQ SEL) and 20.14 (MAX TORQ SEL). This is an informative alarm (programmable Fault Function 30.23, bit 3: MOT_TORQ_LIM_IND) indicating the drive is operating at its configured torque boundaries.

The drive is actively limiting motor power according to the boundaries defined by parameter 20.11 (P MOTORING LIM) for motoring and 20.12 (P GENERATING LIM) for generating. This is an informative alarm (programmable Fault Function 30.23, bit 4: MOT_POW_LIM_IND) indicating the drive is operating at its configured power limits.

An overtemperature condition has been detected within the AINT board of the inverter module. This indicates the internal temperature of the board has exceeded its safe operating limit.

An overtemperature condition has been detected in the choke of a liquid-cooled R8i inverter module. This indicates that the choke's temperature has surpassed its safe operating threshold.

A source selection (pointer) parameter within the drive's configuration is pointing to a non-existent parameter index. This indicates an invalid parameter configuration, which can lead to unexpected drive behavior or incorrect signal routing.